Question about Brother MFC-8840D All-In-One Laser Printer

1 Answer

Fuser Gear Md No. LJ 7416

Hi Guys.

I was given  this all-in -one unit, "if you can fix it, it's yours" senario. I've pulled appart the fuser and found two problems. The LJ 7416 gear has snaped in three places (need a new one) and the gear that drives this gear is slightly worn on the edges (will this need to be replaced?)

How much for the LJ 7416

Thanks for your time guys.

Daniel

Posted by on

  • Dal B Oct 28, 2007

    Thanks Soulvistor, best advice. I will do that. I also have the HP OJ G85 from new, only problem was scanner failure, after a good clean it's still going strong!



    Thanks again Dal B

  • david85 Dec 07, 2007

    hi,

    I am having the same problem, but i don't know how to open up to get to the fuser, Is there anyway i can get a service manual or some advice. Thank first

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  • Brother Master
  • 1,113 Answers

You will need to purchase these gears from a brother dealer but I warn against just changing the gears you mention, fuser driver gear in printer frame will be ok unless chipped, but usally the big gear on the fuser goes as does a little white one next to it, and these are breaking becase the fuser is hard to turn, if you just change the gear, the fault will reappear after a little use, best bet is to replace fuser assy (approx $150)

Posted on Oct 27, 2007

  • Soulvisitor
    Soulvisitor Dec 08, 2007

    David.. face back of printer one screw centre, panel comes off, now door can come off then right and left rear cover screw off, the unswer fuser and unplug.

  • Soulvisitor
    Soulvisitor Dec 16, 2007

    parts LINK

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Hi there, i have an hp 3500 printer. the fuser was ript appart and needed replacment.(the rol was broken on one side and was not burning the inkt on the paper anymore) i have got a new one, but keep...


50.9 error - Fuser Failure (Abnormally High
Temperature Sub Thermistor)
1. The connector between the fuser and
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Reseat the fuser. Check the connector J5013
between the fuser and the printer. Replace it
if damaged.
2. Short in the sub thermistor. Turn the
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The fuser might be very hot. After turning off the printer power, allow the fuser to cool for atleast 30 minutes.

1. Remove the rear output bin.
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